564 



FUNAFUTI ATOLL. 



AGADINA STIMPSONI, A. Adams. 

 Pelseneer, loc. cit., p. 31, pi. i., figs. 11-14. 



A few specimens dredged off Tutaga Islet in 45 - 52 and 2 00 

 fathoms and north of Pava in 36 fathoms. 



PELECYPODA. 

 ARCA PTEROESSA, Smith. 



Smith, Chall. Rep., Zoo!., xiii., 1885, p. 262, pi. xvii., fig. 4. 



Two small .separate valves were dredged at 200 fathoms off 

 Tutaga Islet. 



ARCA CONGKNITA, Smith. 

 Smith, loc. cit., p. 264, pi. xvii., fig. 6. 



One small valve from 50 - 60 fathoms off Tutaga Islet. 



LIMOPSIS DAVIDIS, sp. nov. 

 (Fig. 80.) 



Shell small, suborbicular, flattened, 

 scarcely inequilateral. Colour white, 

 with a few, small, scattered brown 

 dots. Posterior margin truncate ; 

 ventral and anterior margins rounded. 

 Umbo prominent. Epidermis de- 

 nuded. Sculpture about twenty- 

 four, prominent, radiating ridges 

 sharply crenulate the margin and 

 fade away before reaching the umbo, 

 these are separated by flat interstices 

 of about twice their breadth. They are 

 more prominent and closer together 

 at the posterio- ventral side, but for a 

 space in the posterior slope one or 

 two seem missing. The whole valve 

 is covered with close concentric 

 wrinkles, which become coarser as 

 the ventral margin is approached. 

 Hinge area very broad and rather 

 curved, teeth three on each side. 

 Internal margin crenulate. Height 

 1-22, length 1-22 mm. 



One valve from 45 52 fathoms 

 off Tutaga Islet. 



Named in honour of Prof. T. W. E. David, B.A., under whose 

 auspices it was secured. 



